because in bcash land they can convince the miners to include tx's with 1 satoshi fee, so they can bloat their chain with all kinds of junk like yours.org Good luck doing that in ethereum land.
Your "'wrong' is wrong" is wrong. Yo can verify transaction history with an SPV wallet.
A full node won't help you against an eclipse attack. And also not against a sustained 51% attack since miners can mine empty blocks on the minority chain, halting it.
A full node is good for increasing your privacy, disguising what addresses you're watching, but that's all.